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As Buick currently claws and scratches its way back into relevance to compete against luxury brands like Lexus and Acura, it's hard to believe that not too long ago, the brand had a car that was mentioned in the same breath as Corvette, Lamborghini and Ferrari. That car? None other than the Buick Grand National. All black with a turbocharged V6 and some of the quickest acceleration of its time, the Grand National, in today's standards, is along the lines of a 2013 Shelby GT500 with both cars ess

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Inside Line reports Buick is planning to bring back some of the more storied names from the company's past, including the Grand National, GNX and the T-Type. Those cars rose to prominence in the 1970s and '80s to become performance legends of their day.

Black Air, the documentary on the Buick Grand National, is set for release on December 11 of this year. On August 4, however, the first 20 minutes of the film will be screened at the at the national meet of the Buick Performance Group in Hebron, Ohio.

The car you see here is not a GNX. Hell, it's not even a Buick. You'd be forgiven if you thought it was, though, and it does sport a turbocharger underhood. David Morad was so enamored with the 6.6L LB7 Duramax diesel in his truck that he wanted to put it into something lighter and more fun. He decided to build a Grand National around the engine, and started buying up whatever applicable Buick body parts he could find -- right down to legit GNX dash plates. Next, he bought an '82 Buick Regal die